A witness shall not be
excused from answering any question as to any matter relevant to the matter in
issue in any suit or in any civil or criminal proceeding, upon the ground that
the answer to such question will criminate, or may tend directly or indirectly
to criminate, such witness, or that it will expose, or tend directly or
indirectly to expose, such witness to a penalty or forfeiture of any kind:

Proviso – Provided
that no such answer, which a witness shall be compelled to give, shall subject
him to any arrest or prosecution, or be proved against him in any criminal
proceeding, except a prosecution for giving false evidence by such answer.